Seiho Akimaru from The Mainichi:
People living in Japan will likely recognize "Hotaru no Hikari," a song based on the Scottish folk song "Auld Lang Syne" which has become the standard tune played at shops in the country just before closing. Outside Japan, the folk song is often sung by crowds who gather on New Year's Eve to mark the turn of the year.
"When 'Hotaru no hikari' plays, Japanese people understand that it is time to close the store. However, in recent years, the number of foreigners has increased, and more people are present who do not understand its meaning. It's difficult to announce that the store is closing without spoiling the enjoyment of shopping. Therefore, we have come up with new closing music that casually announces the closing, but still allows shoppers to leave comfortably."
This is classico Japan taking an element from overseas and transforming it into something befitting local culture.